IV. To explore the relationship among the panel of biomarkers evaluated in this cohort including mutations and single nucleotide polymorphisms in BRAF, KRAS2, FGFR2, PI3KCA, AKT1, AKT2, AKT3 and PTEN as well as immunohistochemical expression of ERK, pERK, GSK3betta, pGSK3betta, PR-A, PR-B, pPR, ER-alpha, ER-beta, BRAF, KRAS, PTEN, EGFR, pEGFR, EGF, PELP1 and MTA1s.